| 摘要 |
PROBLEM TO BE SOLVED: To provide a displacement amount detecting method of an auger excavated hole, capable of making improvements in excavating accuracy by grasping an amount of displacement to an ideal vertical hole of the auger excavation at a real time during operations, and correcting the excavating direction and the like. SOLUTION: An inclinometer 20 capable of measuring a tilt angle to the vertical direction is installed in a tip auger rod 11, and in a first measuring point P1 where this tip rod 11 exists underground, an amount of displacement T1 =L1 sinθ1 is grasped from a tilt angleθ1 and tip rod length L1 by the inclinometer 20, and in a second measuring point P2 where the tip rod 11 + a second rod 12 exist underground, and amount of horizontal displacement T2 =L2 sinθ2 to the first measuring point P1 is grasped from a tilt angleθ2 and another rod length (second rod length) L2 entered underground anew, and then an equation T1 +T2 =L1 sinθ1 +L2 sinθ2 is grasped as the displacement at the second measuring point P2 . Likewise, the amount of displacement T in the current depth is additively calculable.
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